—Did Judy invite you ________ dinner with her?—Yes，but I refused.
A. to have B. have C. having D. had
—When did you go to bed last night?—I didn't go to bed ___ I finished reading the novel.
A. if B. until C. though D. because
The Browns look forward to ___ a trip to New York next week.
A. go B. going C. take D. taking
Wang Lei ________ to Hong Kong to visit his aunt the day after tomorrow.
A. goes B. will go C. went D. go
—When will your father come back?—______ a week.
A. On B. For C. At D. In
I predict there will be less ______ in the future.
A. people B. trees C. countries D. pollution
